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58d0e85 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 | import unittest
from unittest.mock import AsyncMock, patch
from app.models import DNSResult, DisposableResult, SMTPResult, ValidationStatus
from app.validator.engine import EmailValidationEngine
from app.validator.retry_queue import MemoryRetryStore, RetryQueue
def _dns(host="mx.corp.test"):
return DNSResult(
domain_exists=True,
has_mx_records=True,
mx_records=[{"host": host, "priority": 10}],
)
def _clean():
return DisposableResult(
is_disposable=False, is_free_provider=False, is_role_based=False
)
class NullCache:
async def get_dns(self, domain):
return None
async def put_dns(self, domain, result):
return None
async def get_verdict(self, email, deep):
return None
async def put_verdict(self, email, deep, smtp, catch_all):
return None
class ScriptedProvider:
def __init__(self, mapping):
self.mapping = mapping
async def verify_many(self, pairs):
return (
{e: self.mapping.get(e, SMTPResult(verified=True, smtp_code=250)) for e, _ in pairs},
{},
)
async def verify(self, email, mx_host):
return self.mapping.get(email, SMTPResult(verified=True, smtp_code=250))
async def catch_all(self, domain, mx_host):
return (False, 0.9)
class EngineRetryIntegrationTests(unittest.IsolatedAsyncioTestCase):
"""4xx rows must be re-queued (bounded), definitive rows must not."""
async def test_greylisted_row_is_enqueued(self):
clock = {"t": 0.0}
queue = RetryQueue(store=MemoryRetryStore(), backoff_seconds=600, now=lambda: clock["t"])
engine = EmailValidationEngine(
mailbox=ScriptedProvider(
{"a@corp.test": SMTPResult(verified=None, smtp_code=451,
smtp_message="451 greylisted, try later")}
),
cache=NullCache(),
retry_queue=queue,
)
with (
patch("app.validator.engine.check_dns", new=AsyncMock(return_value=_dns())),
patch("app.validator.engine.check_disposable", return_value=_clean()),
):
results = await engine.validate_batch(["a@corp.test"], deep=True)
self.assertEqual(await queue.size(), 1)
entry = (await queue.due(limit=1)) if clock["t"] > 600 else None
# Still pending (not yet due), but queued.
self.assertEqual(results[0].status, ValidationStatus.RISKY)
async def test_verified_row_is_not_enqueued(self):
queue = RetryQueue(store=MemoryRetryStore(), now=lambda: 0.0)
engine = EmailValidationEngine(
mailbox=ScriptedProvider(
{"a@corp.test": SMTPResult(verified=True, smtp_code=250)}
),
cache=NullCache(),
retry_queue=queue,
)
with (
patch("app.validator.engine.check_dns", new=AsyncMock(return_value=_dns())),
patch("app.validator.engine.check_disposable", return_value=_clean()),
):
await engine.validate_batch(["a@corp.test"], deep=True)
self.assertEqual(await queue.size(), 0)
async def test_rejected_row_is_not_enqueued(self):
queue = RetryQueue(store=MemoryRetryStore(), now=lambda: 0.0)
engine = EmailValidationEngine(
mailbox=ScriptedProvider(
{"a@corp.test": SMTPResult(verified=False, smtp_code=550,
smtp_message="550 no such user")}
),
cache=NullCache(),
retry_queue=queue,
)
with (
patch("app.validator.engine.check_dns", new=AsyncMock(return_value=_dns())),
patch("app.validator.engine.check_disposable", return_value=_clean()),
):
await engine.validate_batch(["a@corp.test"], deep=True)
self.assertEqual(await queue.size(), 0)
async def test_transport_failure_is_not_enqueued(self):
# Systemic to the MX — the circuit breaker owns this, not the queue.
queue = RetryQueue(store=MemoryRetryStore(), now=lambda: 0.0)
engine = EmailValidationEngine(
mailbox=ScriptedProvider(
{"a@corp.test": SMTPResult(verified=None, error="transport_error: timed out")}
),
cache=NullCache(),
retry_queue=queue,
)
with (
patch("app.validator.engine.check_dns", new=AsyncMock(return_value=_dns())),
patch("app.validator.engine.check_disposable", return_value=_clean()),
):
await engine.validate_batch(["a@corp.test"], deep=True)
self.assertEqual(await queue.size(), 0)
async def test_queue_failure_does_not_break_validation(self):
class BrokenQueue:
async def enqueue(self, *a, **k):
raise RuntimeError("redis down")
engine = EmailValidationEngine(
mailbox=ScriptedProvider(
{"a@corp.test": SMTPResult(verified=None, smtp_code=451)}
),
cache=NullCache(),
retry_queue=BrokenQueue(),
)
with (
patch("app.validator.engine.check_dns", new=AsyncMock(return_value=_dns())),
patch("app.validator.engine.check_disposable", return_value=_clean()),
):
results = await engine.validate_batch(["a@corp.test"], deep=True)
# The row still has a verdict; a broken queue must never lose it.
self.assertEqual(len(results), 1)
async def test_engine_without_queue_still_works(self):
engine = EmailValidationEngine(
mailbox=ScriptedProvider({"a@corp.test": SMTPResult(verified=True, smtp_code=250)}),
cache=NullCache(),
)
with (
patch("app.validator.engine.check_dns", new=AsyncMock(return_value=_dns())),
patch("app.validator.engine.check_disposable", return_value=_clean()),
):
results = await engine.validate_batch(["a@corp.test"], deep=True)
self.assertEqual(results[0].status, ValidationStatus.VALID)
if __name__ == "__main__":
unittest.main() |